All hard drives are essentially the same, you just need to format it to HFS+ if you plan on using it only for Macs, but if you intend on using it with Windows, too, you need to format it to MSDOS (FAT32).

I would recommend Deja Vu (search for it) for doing backups.

I try to Command+Shift+/ when I can.
They're - Their - There | Two - Too - To | You're - Your | MAC - Mac

All hard drives are essentially the same, you just need to format it to HFS+ if you plan on using it only for Macs, but if you intend on using it with Windows, too, you need to format it to MSDOS (FAT32).

I would recommend Deja Vu (search for it) for doing backups.

Thanks surfwax - does this mean that if I format it to MSDOS (FAT32) I can work on both Windows and Mac then store files on the HDD and they'll work on both OS'. (IE: If I do a PSD file on Windows I'll be able to save it into the MSDOS (FAT32) formatted HDD and put it onto my Mac and open it?)